NSOutlineView Changing disclosure Image

Question

I my outline view, i am adding Custom cell, To drawing custom cell, i am referring example code , present in the Cocoa documentation

http://www.martinkahr.com/2007/0

Answer 1

For who looks for Swift2 Solution. Subclass NSRow of your outlineview and override didAddSubview method as below.

override func didAddSubview(subview: NSView) {
    super.didAddSubview(subview)
    if let sv = subview as? NSButton {
        sv.image = NSImage(named:"IconNameForCollapsedState")
        sv.alternateImage = NSImage(named:"IconNameForExpandedState")
    }
}